<!DOCTYPE html>

<style>
  body {
    font-family: sans-serif;
  }

  #reference {
    background: blueviolet;
    color: white;
    display: grid;
    place-items: center;
    width: 200px;
    height: 200px;
  }

  #floating {
    background: #333;
    color: white;
    padding: 15px;
    width: 500px;
  }

  #arrow {
    width: 15px;
    height: 15px;
    background: yellow;
  }
</style>

<div id="root"></div>

<script type="module" src="./index.js"></script>
